Folded cameras with continuously adaptive zoom factor

ABSTRACT

Folded Tele cameras, comprising: an optical path folding element (OPFE) for a folding a first optical path OP1 to second optical path OP2, a lens including N lens elements, the lens being divided into four lens groups arranged along a lens optical axis and marked, in order from an object side of the lens to an image side of the lens, G1, G2, G3 and G4, and an image sensor, wherein the lens elements of a lens group do not move with respect to each other, wherein G1 and G3 do not move with respect to each other, wherein G2 and G4 do not move with respect to each other, wherein the Tele camera is configured to change a zoom factor (ZF) continuously between a minimum zoom factor marked ZFMIN corresponding to a minimal effective focal length marked EFLMIN and a maximum zoom factor marked ZFMAX corresponding to a maximal effective focal length marked EFLMAX by moving G1 and G3 together relative to the image sensor and by moving G2 and G4 together relative to the image sensor.

CROSS REFERENCE TO RELATED APPLICATIONS

This is a 371 application from international patent application No.PCT/IB2022/052515 filed Mar. 20, 2022, which claims benefit of priorityfrom U.S. Provisional patent applications Nos. 63/164,187 filed Mar. 22,2021, 63/177,427 filed Apr. 21, 2021, and 63/300,067 filed Jan. 17,2022, all of which are incorporated herein by reference in theirentirety.

FIELD

Embodiments (examples) disclosed herein relate in general to digitalcameras, and more particularly, to multi-aperture zoom digital cameraswith a folded continuous zoom lens for use in handheld electronic mobiledevices such as smartphones.

Definitions

The following symbols and abbreviations are used, all of terms known inthe art:

-   -   Total track length (TTL): the maximal distance, measured along        an axis parallel to the optical axis of a lens, between a point        of the front surface S1 of a first lens element L1 and an image        sensor, when the system is focused to an infinity object        distance.    -   Back focal length (BFL): the minimal distance, measured along an        axis parallel to the optical axis of a lens, between a point of        the rear surface S2N of the last lens element LN and an image        sensor, when the system is focused to an infinity object        distance.    -   Effective focal length (EFL): in a lens (or an assembly of lens        elements L1 to LN), the distance between a rear principal point        P′ and a rear focal point F′ of the lens.    -   F number (F/#): the ratio of the EFL to an entrance pupil        diameter.

BACKGROUND

Multi-aperture cameras (or “multi-cameras”, of which a “dual-camera”having two cameras is an example) are now standard for handheldelectronic mobile devices (or simply “mobile devices”, for examplesmartphones, tablets, etc.). A multi-camera usually comprises a widefield-of-view FOV camera (“Wide” or “W” camera with FOV_(W)), and atleast one additional camera with a narrower (than FOV_(W)) field-of-view(Telephoto, “Tele” or “T” camera, also referred to as “TC”, withFOV_(T)). In general, the spatial resolution of the TC is constant (or“fixed”) and may be for example 3, 5, or 10 times higher than thespatial resolution of the W camera. This is referred to as the TC havinga fixed “zoom factor” (ZF) of, respectively, 3, 5, or 10.

As an example, consider a dual-camera having a W camera and a TC with ZFof 5. When zooming onto a scene, one may in general use W camera imagedata, which is digitally zoomed up to a ZF of 5. For a ZF≥5, one may useTC image data, digitally zoomed for ZF>5. In some scenes, a high ZF isdesired for capturing scene segments with high spatial resolution. Inother scenes, a high ZF is undesired, as only (digitally zoomed) Wcamera image data may be available. This shows the trade-off between theapplicability range of the TC on the one hand (which is larger for TCswith smaller ZF) and the TC's zoom capability on the other hand (whichis larger for TCs with larger ZF). In general, both large applicabilityrange and large zoom capability are beneficial. This cannot be achievedin known TCs having a fixed ZF.

For a given image sensor included in a TC, the TC's ZF is determinedsolely by its EFL. A TC that can switch continuously between two extreme(minimal and maximal) EFLs, EFL_(MIN) and EFL_(MAX), for providing anyZF between minimal and maximal ZFs ZF_(MIN) and ZF_(MAX), is describedfor example in co-owned international patent applicationPCT/IB2021/061078.

There is need for, and it would be beneficial to have a Tele camera thatcan provide all ZFs between ZF_(MIN) and ZF_(MAX) whereinZF_(MAX)≥2×ZF_(MIN), continuously and in a slim camera module formfactor having large aperture heights for a given camera module's heightand by requiring relatively small lens stroke ranges for switchingbetween ZF_(MIN) and ZF_(MAX).

SUMMARY

In various examples, there are provided cameras, comprising: an OPFE fora folding a first optical path OP1 to second optical path OP2; a lensincluding N lens elements, the lens being divided into four lens groupsarranged along a lens optical axis and marked, in order from an objectside of the lens to an image side of the lens, G1, G2, G3 and G4; and animage sensor, the camera is a folded Tele camera, the lens elements of alens group do not move with respect to each other, G1 and G3 do not movewith respect to each other, G2 and G4 do not move with respect to eachother, the Tele camera is configured to change a zoom factor (ZF)continuously between ZF_(MIN) corresponding to EFL_(MIN) and ZF_(MAX)corresponding to EFL_(MAX) by moving G1 and G3 together relative to theimage sensor and by moving G2 and G4 together relative to the imagesensor, wherein ZF_(MAX)/ZF_(MIN)≥2, wherein switching from EFL_(MIN) toEFL_(MAX) or vice versa requires a lens stroke range S, and wherein aratio R given by R=(EFL_(MAX)−EFL_(MIN))/S fulfils R>2.

In some examples, R>3. In some examples, R>5.

In some examples, ZF_(MAX)/ZF_(MIN)≥2.5. In some examples,ZF_(MAX)/ZF_(MIN)≥2.75.

In some examples, the configuration to change the ZF continuouslyincludes a configuration to move G1 and G3 together relative to theimage sensor over a small range larger than 0.1 mm and smaller than 5 mmand to move G2 and G4 together relative to the image sensor over a largerange larger than 2 mm and smaller than 15 mm.

In some examples, the configuration to change the ZF continuouslyincludes a configuration to move G1 and G3 together relative to theimage sensor over a small range larger than 0.2 mm and smaller than 2.5mm, and to move G2 and G4 together relative to the image sensor over alarge range larger than 4 mm and smaller than 10 mm.

In some examples, the configuration to change the ZF continuouslyincludes a configuration to move G2 and G4 together relative to theimage sensor over a small range larger than 0.1 mm and smaller than 5mm, and to move G1 and G3 together relative to the image sensor over alarge range larger than 2 mm and smaller than 15 mm.

In some examples, the configuration to change the ZF continuouslyincludes a configuration to move G2 and G4 together relative to theimage sensor over a small range larger than 0.2 mm and smaller than 2.5mm, and to move the G1 and G3 together relative to the image sensor overa large range larger than 4 mm and smaller than 10 mm.

In some examples, G1 and G3 are included in a single G13 carrier and G2and G4 are included in a single G24 carrier.

In some examples, both the G24 carrier and the G13 carrier include railsfor defining a position of the G13 carrier relative to the G24 carrier.

In some examples, a maximum stroke range of the G13 carrier is S13, amaximum stroke range of the G24 carrier is S24, and a ratio S24/S13>7.5.In some examples, S24/S13>12.5.

In some examples, the G24 and G13 carriers are movable by, respectively,G24 and G13 actuators. In some examples, one of the G24 actuator or theG13 actuator includes three or more magnets.

In some examples, the lens includes N=10 lens elements.

In some examples, a power sequence of lens groups G1-G4 ispositive-negative-positive-positive.

In some examples, G1 includes two lens elements with a positive-negativepower sequence, G2 includes two lens elements with a negative-negativepower sequence, G3 includes three lens elements with apositive-positive-positive power sequence, and G4 includes three lenselements with a positive-negative-positive power sequence.

In some examples, G1 includes two lens elements with a positive-negativepower sequence, G2 includes two lens elements with a negative-positivepower sequence, G3 includes three lens elements with apositive-negative-positive power sequence, and G4 includes three lenselements with a positive-negative-positive power sequence.

In some examples, G1 includes two lens elements with a negative-positivepower sequence, G2 includes three lens elements with apositive-negative-negative power sequence, G3 includes three lenselements with a positive-negative-negative power sequence, and G4includes two lens elements with a negative-positive power sequence.

In some examples, the camera has a F number F/#, the F/# at ZF_(MIN) isF/#_(MIN), the F/# at ZF_(MAX) is F/#_(MAX), andEFL_(MAX)/EFL_(MIN)>F/#_(MAX)/F/#_(MIN). In some examples,EFL_(MAX)/EFL_(MIN)>F/#_(MAX)/F/#_(MIN)+0.5.

In some examples, a magnitude of an EFL of G2 |EFL_(G2)| varies lessthan 10% from a magnitude of an EFL of G3 |EFL_(G3)|, and |EFL_(G2)|,|EFL_(G3)|<EFL_(MIN).

In some examples, lens groups G1 and G2 include 2 lens elements, andlens group G3 and G4 include 3 lens elements.

In some examples, the larger of a thickness T_(G2) of G2 and of athickness T_(G1) of G1 is T(G1,G2)_(MAX), the smaller of T_(G2) andT_(G1) is T(G1,G2)_(MIN), and T(G1,G2)_(MIN)/T(G1,G2)_(MAX)<0.8.

In some examples, 0.75<T(G1,G2)_(MIN)/T(G1,G2)_(MAX)<1.0.

In some examples, a ratio of a thickness T_(G4) of G4 and a thicknessT_(G3) of G3 fulfill 0.9<T_(G4)/T_(G3)<1.1.

In some examples, the larger of T_(G3) and T_(G4) is T(G3,G4)_(MAX), thesmaller of T_(G3) and T_(G4) is T(G3,G4)_(MIN), andT(G1,G2)_(MAX)/T(G3,G4)_(MIN)<0.5. In some examples,0.5<T(G3,G4)_(MIN)/T(G3,G4)_(MAX)<0.75. In some examples,0.9<T(G1,G2)_(MAX)/T(G3,G4)_(MIN)<1.1.

In some examples, lens groups G1 and G4 include 2 lens elements, andlens groups G2 and G3 include 3 lens elements.

In some examples, the camera includes an aperture stop, and the aperturestop is located at a front surface of a first lens element of G2. Insome examples, the aperture stop is located at a rear surface of asecond lens element of G2. In some examples, aperture stop is located atthe front surface of the first lens element of G3.

In some examples, an EFL of G1 (EFL_(G1)) varies less than 50% from anEFL of G4 (EFL_(G4)), and both EFL_(G1) and EFL_(G4) vary by less than20% from (EFL_(MAX)+EFL_(MIN))/2. In some examples, EFL_(G1) varies lessthan 50% from EFL_(G4) and both EFL_(G1) and EFL_(G4) vary by less than20% from (EFL_(MAX)+EFL_(MIN))/2. In some examples,EFL_(G4)>10×EFL_(MAX).

In some examples, EFL_(G1)<0.15×EFL_(G4), and both EFL_(G1) and EFL_(G4)vary by less than 20% from (EFL_(MAX)+EFL_(MIN))/2. In some examples,EFL_(G4)>10×EFL_(MIN).

In some examples, G1 and G3 have each at least two lens elements, andthe first two lens elements in each of G1 and G3 are separated from eachother on the lens optical axis by <0.75 mm.

In some examples, G1 and G3 have each at least two lens elements, andthe first two lens elements in each of G1 and G3 are separated from eachother on the lens optical axis by <0.1×EFL_(MIN).

In some examples, first two lens elements in G2 and in G4 are separatedfrom each other at margins of each lens element by <0.1 mm. In someexamples, first two lens elements in G2 and in G4 are separated fromeach other at margins of each lens element by <0.01×EFL_(MIN).

In some examples, the N lens elements include a first lens element L1, asecond lens element L2, an eighth lens element L8 and a ninth lenselement L9, and L1 and L2 and L8 and L9 form respective doublet lenses.

In some examples, first two lens elements in G2 and in G4 are separatedfrom each other at margins of each lens element by <0.1 mm. In someexamples, first two lens elements in G2 and in G4 are separated fromeach other at margins of each lens element by <0.01×EFL_(MIN).

In some examples, the N lens elements include a first lens element L1, asecond lens element L2, a third lens element L3, a fourth lens elementL4, a sixth lens element L6, a seventh lens element L7, an eight lenselement L8 and a ninth lens element L9, L1 and L2, L3 and L4, and L8 andL9 form respective doublet lenses, and L6 and L7 form an inverteddoublet lens.

In some examples, a maximum distance between lens elements of the movinggroups G1 and G3 is smaller than 0.1×EFL_(MIN).

In some examples, the N lens elements include a first lens element L1, asecond lens element L2, a third lens element L3, a fourth lens elementL4, an seventh lens element L7 and an eighth lens element L8, L1 and L2,L3 and L4, form respective inverted doublet lenses, and L7 and L8 form adoublet lens.

In some examples, a difference between distances of the OPFE from thefront surface of the first lens element lens measured along an axisparallel to the lens optical axis for all ZFs is marked Δd, and a ratioof Δd and a lens thickness T_(Lens) fulfils Δd/T_(Lens)<0.25 when Δd<4mm. In some examples, Δd/T_(Lens)<0.05 for Δd<1 mm.

In some examples, the camera has an aperture diameter DA_(MIN) atEFL_(MIN) and a minimum F number F/#m=EFL_(MIN)/DA_(MIN), and F/#_(MIN)is <4. In some examples, F/#_(MIN) is <3. In some examples, F/#_(MIN) is<2.5.

In some examples, the camera has an aperture diameter DA_(MAX) atEFL_(MAX), and a maximum F number F/#_(MAX)=EFL_(MAX)/DA_(MAX), and4.4<F/#_(MAX)<6.

In some examples, DA_(MIN)/DA_(MAX)>0.4. In some examples,DA_(MIN)/DA_(MAX)>0.5. In some examples, DA_(MIN)/DA_(MAX)>0.75. In someexamples, 5 mm<DA_(MAX)<7 mm.

In some examples, F/#_(MIN)=EFL_(MIN)/DA_(MIN),F/#_(MAX)=EFL_(MAX)/DA_(MAX), and F/#_(MAX)/F/#_(MIN)<1.3-3.

In some examples, the lens has a maximum total track length TTL_(MAX),and TTL_(MAX)/EFL_(MAX)<1.2. In some examples, TTL_(MAX)/EFL_(MAX)<1.1.

In some examples, the camera is configured to be focused by moving lensgroups G1+G2+G3+G4 together as one lens.

In some examples, the camera is included in a camera module having amodule height H_(M), the lens has a lens aperture height H_(A), bothH_(M) and H_(A) are measured along an axis parallel to OP1, H_(M)=5mm-15 mm, H_(A)=3 mm-10 mm, and H_(M)<H_(A)+3 mm. In some examples,H_(M)<H_(A)+2 mm.

In some examples, the OPFE is configured to be rotated for optical imagestabilization (OIS) along two rotation axes, a first rotation axisparallel to OP1 and a second rotation axis perpendicular to both OP1 andOP2.

In some examples, the OPFE is a prism.

In some examples, the prism is a cut prism with a prism optical heightH_(P) measured along an axis parallel to OP1 and with a prism opticalwidth W_(P) measured along an axis perpendicular to both OP1 and OP2,and W_(P) is larger than H_(P) by between 5% and 30%.

In some examples, the lens is a cut lens with a cut lens aperture heightH_(A) measured along an axis parallel to OP1 and with a lens aperturewidth W_(A) measured along an axis perpendicular to both OP1 and OP2,and W_(A) is larger than H_(A) by between 5% and 50%.

In some examples, EFL_(MAX) is between 24 mm and 30 mm.

In some examples, EFL_(MIN)≥9 mm.

In some examples, the folded Tele camera is included in a dual-cameraalong with a Wide camera having a field-of-view larger than the foldedTele camera. In some examples, there is provided a smartphone comprisinga dual-camera as above.

In some examples, there is provided a smartphone comprising any of thecameras above or below.

BRIEF DESCRIPTION OF THE DRAWINGS

Non-limiting examples of embodiments disclosed herein are describedbelow with reference to figures attached hereto that are listedfollowing this paragraph. The drawings and descriptions are meant toilluminate and clarify embodiments disclosed herein and should not beconsidered limiting in any way. Like elements in different drawings maybe indicated by like numerals. Elements in the drawings are notnecessarily drawn to scale. In the drawings:

FIG. 1A illustrates a dual-camera that comprises a known foldedcontinuous zoom T camera (or “FCZT camera”) as disclosed herein togetherwith a W camera;

FIG. 1B shows schematically an embodiment of a G24 FCZT camera disclosedherein in a first, minimal zoom state with ZFM_(MIN) and EFL_(MIN);

FIG. 1C shows the FCZT camera of FIGS. 1A and 1B schematically in asecond, maximal zoom state with ZF_(MAX) and EFL_(MAX);

FIG. 1D shows schematically an embodiment of a G13 FCZT camera disclosedherein and in a first, minimal zoom state with ZF_(MIN) and EFL_(MIN);

FIG. 1E shows the FCZT camera of FIG. 1D schematically in a second,maximal zoom state with ZF_(MAX) and EFL_(MAX);

FIG. 2A shows an embodiment of a G24 FCZT camera module disclosed hereinin a perspective view;

FIG. 2B shows the camera module of FIG. 2A in a side view;

FIG. 2C shows the camera module of FIG. 2A in a first exploded view;

FIG. 2D shows the camera module of FIG. 2A in a second exploded view;

FIG. 2E shows an example a cut lens;

FIG. 2F shows an example of a cut prism;

FIG. 3A shows the camera module of FIG. 2A in a perspective view andwithout a top shield;

FIG. 3B shows the camera module of FIG. 2A without the top shield fromFIG. 3A in an exploded view;

FIG. 4A shows the camera module of FIG. 2A-2D in a bottom view and witha flex partly removed for exposing a pitch coil, a pitch positionsensor, two yaw coils and a yaw position sensor;

FIG. 4B shows the camera module of FIG. 2A-2D in a bottom view with someof the elements shown in FIG. 4A removed;

FIG. 4C shows an OPFE module in the camera module of FIG. 2A-2D in aperspective top view;

FIG. 4D shows the OPFE module of FIG. 4C in a perspective bottom view;

FIG. 4E shows a G13 carrier in the camera module of FIG. 2A-2D in aperspective bottom view;

FIG. 4F shows the G13 carrier of FIG. 4E in a bottom view;

FIG. 4G shows a G24 carrier in the camera module of FIG. 2A-2D in aperspective top view;

FIG. 4H shows a position magnet included in the G13 carrier and aposition sensor included in the flex in a perspective view;

FIG. 5A shows components of the FCZT camera module of FIGS. 2A-2D in aminimum zoom state in a perspective view;

FIG. 5B shows components of the FCZT camera module of FIGS. 2A-2D in anintermediate zoom state in a perspective view;

FIG. 5C shows components of the FCZT camera module of FIGS. 2A-2D in amaximum zoom state in a perspective view;

FIG. 6A shows a first example of an optical lens system disclosed hereinin a first, minimal zoom state having an EFL_(MIN)=9.6 mm;

FIG. 6B shows the optical lens system of FIG. 6A in a second, maximumzoom state having an EFL_(MAX)=24.0 mm;

FIG. 6C gives the values for Δd for the optical lens system of FIGS.6A-B, as defined in FIGS. 1B-1C;

FIG. 7A shows a second example of an optical lens system disclosedherein in a minimal zoom state having an EFL_(MIN)=9.96 mm;

FIG. 7B shows the optical lens system of FIG. 7A in a maximum zoom statehaving an EFL_(MAX)=27.0 mm;

FIG. 7C gives the values for Δd for the optical lens system of FIGS.7A-B, as defined in FIGS. 1B-1C;

FIG. 8A shows a third example of an optical lens system disclosed hereinin a minimal zoom state having an EFL_(MIN)=10 mm;

FIG. 8B shows the optical lens system of FIG. 8A in an intermediate zoomstate having an EFL_(MID)=20 mm;

FIG. 8C shows the optical lens system of FIG. 8A in a maximum zoom statehaving an EFL_(MAX)=30 mm.

DETAILED DESCRIPTION

FIG. 1A illustrates a dual-camera 150 that comprises a folded continuouszoom T camera (or “FCZT camera”) 100 as disclosed herein together with aW camera 130. T camera 100 comprises an optical path folding element(OPFE) 102 e.g. a prism or mirror, a lens 110 with a plurality of lenselements (not visible in this representation) having a lens optical axis108 and an image sensor 106. OPFE folds an optical path from a firstoptical path 112 (“OP1”) to a second optical path 114 (“OP2”). W camera130 comprises a lens 134 with an optical axis 136 and an image sensor138.

FIG. 1B shows schematically an embodiment of a FCZT camera disclosedherein and numbered 160 in a first, minimal zoom state (with a minimalzoom factor ZF_(MIN)) having a minimal EFL=EFL_(MIN). EFL_(MIN)corresponds to a minimal ZF_(MIN). FCZT camera 160 comprises an OPFE162, a lens 164, an (optional) optical element 166 and an image sensor168. Camera 160 is shown with ray tracing. Optical element 166 may befor example an infra-red (IR) filter, and/or a glass image sensor dustcover. Lens 164 is divided in four lens groups (“G1”, “G2”, “G3” and“G4”), wherein each lens group may include one or more lens elements.Lens elements included in each of G1, G2, G3 and G4 are fixedly coupledto each other, meaning that the lens elements included in each of G1,G2, G3 and G4 can move with respect to the lens elements included in anyother lens group and with respect to other components included in camera160 (such as image sensor 168), but not with respect to each other.Further, G2 and G4 are fixedly coupled and move together as one group(group “G24” see marked). The G24 group is moved with a large stroke,G1+G2+G3+G4 are moved together as one lens with a small stroke, while G1and G3 can move together independently of the G24 group.

FIG. 1C shows FCZT camera 160 schematically in a second, maximal zoomstate (with a maximal zoom factor ZF_(M)ax) having a maximalEFL=EFL_(MAX). The transition or switching from EFL_(MAX) to EFL_(MIN)can be performed continuously, i.e. camera 160 can be switched to anyother ZF that satisfies ZF_(MIN)≤ZF≤ZF_(MAX) (orEFL_(MIN)≤EFL≤EFL_(MAX)).

This functionality is known in zoom camera lenses that are used forexample in relatively large handheld camera devices such as digitalsingle-lens reflex (DSLR) cameras. Camera 160 can provide this knownfunctionality while having size dimensions that allow it to beintegrated in a camera module such as a G24 FCZT camera module 200 (FIG.2 ), which fits the size constraints of handheld (portable) electronicmobile devices such as smartphones. To clarify, all camera modules andoptical lens systems disclosed herein may beneficially be included orincorporated in smartphones.

For changing ZF, the G24 group is moved with a large stroke, (e.g. of 2mm or more) with respect to G1, G3 and image sensor 168. In addition anddependent on the particular desired EFL, G1+G2+G3+G4 are moved togetheras one lens with a small maximum stroke Δd (Δd≤0.25 mm see FIG. 6C,Δd≤0.7 mm see FIG. 7C) with respect to image sensor 168. Because of thismovement required for ZF change, camera 160 is referred to as a “G24FCZT camera”. The G24 FCZT camera may include a G24 optical lens systemas shown and described for example with reference to FIGS. 6A-C andFIGS. 7A-C.

For situations with camera 160 focused to infinity, a distance “d”between OPFE 162 and lens 164, measured from OPFE 162 to the firstsurface of the first lens element in G1 along an axis parallel to thelens optical axis, shown (in FIG. 1B) in the EFL_(MIN) state (d_(Min))and (in FIG. 1C) in the EFL_(Max) state (d_(Min)), changes slightly forintermediate states EFL_(Min)≤EFL≤EFL_(Max) as detailed in FIG. 6C andFIG. 7C. For any arbitrary pair of EFL states EFL₁ and EFL₂(EFL_(Min)≤EFL₁, EFL₂≤EFL_(Max)) with respective distances d₁ and d₂between OPFE 162 and lens 164, a difference Δd=|d₁−d₂| between thedistances fulfils Δd<1 mm. A small Δd is beneficial for a slim cameramodule, as it allows using a small OPFE. After a ZF change, moving lens164 by Δd with respect to image sensor 168 (and thus moving lens 164 byΔd with respect to OPFE 162) is required to focus camera 160 toinfinity.

FIG. 1D shows schematically another embodiment of a FCZT cameradisclosed herein and numbered 170 in a first, minimal zoom state havingEFL_(MIN). EFL_(MIN) corresponds to a minimal ZF_(MIN). FCZT camera 170comprises an OPFE 172, a lens 174, an (optional) optical element 176 andan image sensor 178. Lens 174 is divided in four lens groups (“G1”,“G2”, “G3” and “G4”), wherein each lens group may include one or morelens elements. Lens elements included in each of G1, G2, G3 and G4 arefixedly coupled to each other. Further, G1 and G3 are fixedly coupledand move together as one group (group “G13” see marked), while G2 and G4can move independently of the G13 group.

FIG. 1E shows FCZT camera 170 schematically in a second, maximal zoomstate having EFL_(MIN). As in camera 160, the transition or switchingfrom EFL_(MAX) to EFL_(MIN) can be performed continuously, i.e. camera170 can be switched to any other ZF that satisfies ZF_(MIN)≤ZF≤ZF_(MAX).

For changing ZF, G13 group is moved with a large stroke, (e.g. of 2 mmor more) with respect to G2, G4 and image sensor 178, while G2 and G4 donot move with respect to image sensor 178. As of this movement requiredfor ZF change, camera 170 is referred to as a “G13 FCZT camera”. G13FCZT camera may include a G13 optical lens system (FIGS. 8A-C). Forfocusing, G1+G2+G3+G4 can be moved together as one lens with respect toimage sensor 178.

Table 1 shows values and ranges of various parameters of exemplaryoptical lens systems numbered 600-800 and of FCZT camera module 200,which are shown and described next. These parameters include TTL, EFL,BFL, SD, T_(Lens), Δd, HA, DA, H_(M), S given in mm, Half-field-of-view(“HFOV”) given in degrees, power sequence, and F/#, N, N_(Gi) givenwithout units. All of these parameters are defined above or below.

EFL_(MIN) and EFL_(MAX), TTL_(MIN) and TTL_(MAX), BFL_(MIN) andBFL_(MAX), DA_(MIN) and DA_(MAX), F/#_(MIN) and F/#_(MAX), T_(MIN) andT_(MAX) and HFOV_(MIN) and HFOV_(MAX) refer respectively to minimum andmaximum EFL, TTL, BFL, DA, F/#, T and HFOV that can be achieved in therespective example. Columns “MIN” and “MAX” refer respectively tominimum and maximum values in the range of values given in the othercolumns.

In optical lens system examples 600 and 700, at both state EFL_(MIN) andstate EFL_(MAX) TTL is given by TTL_(MIN). TTL_(MAX) is given at aparticular intermediate EFL state that corresponds to the maximum in thegraphs shown in FIG. 6C and FIG. 7C respectively. In optical lens systemexample 800, TTL at state EFL_(MIN) is given by TTL_(MIN), and TTL atstate EFL_(MAX) is given by TTL_(MAX).

In optical lens system examples 600 and 700, BFL at state EFL_(MIN) isgiven by BFL_(MIN), and BFL at state EFL_(MAX) is given by BFL_(MAX).

The optical aperture diameter (“DA”) of a lens element is given by thelarger of the DA values of the front or the rear surface. In all opticallens system examples 600-800, DA at state EFL_(MIN) is given byDA_(MIN), and DA at state EFL_(MAX) is given by DA_(MAX).

The optical aperture height (“HA”) of a lens element is given by thelarger of the HA values of the front or the rear surface.

All values of optical lens system examples 600-800 are given for lenseswithout D-cut, so that DA_(MIN)=HA_(MIN) and DA_(MAX)=HA_(MAX).

In all optical lens system examples 600-800, the lens thickness(“T_(Lens)”) at state EFL_(MIN) is given by T_(Lens,MIN), and T_(Lens)at state EFL_(MAX) is given by T_(Lens,MAX). HFOV_(MIN) is obtained atEFL_(MAX) and HFOV_(MAX) is obtained at EFL_(MIN).

“N” represents the number of lens elements in a respective lens.“#N_(Gi)” represents the number of lens elements in a respective lensgroup Gi.

“SD” represents the sensor diagonal.

“S” is a stroke range that represents the maximum movement of lensgroups required for changing a ZF from EFL_(MIN) to EFL_(MAX) or viceversa.

R=(EFL_(MAX)−EFL_(MIN))/S is a ratio between a ZF range determined bythe EFLs in the extreme states and the stroke range S.

T(G_(i),G_(i+1))_(MIN) and T(G_(i),G_(i+1))_(MAX) represent respectivelya minimum and maximum thickness of lens groups G_(i) and G_(i+1).

It is noted that a F/#, e.g. F/#_(MAX), can be increased by furtherclosing an aperture of the lens.

The same is valid for a ratio F/#_(MAX)/F/#_(MIN).

For lens power sequences, “+” indicates a positive lens power and “−”indicates a negative lens power.

TABLE 1 Example 600 700 800 MIN MAX Type G24 G24 G13 N 10 10 10 10 10EFL_(MIN) 9.61 9.96 9.99 9.61 9.99 EFL_(MAX) 24.03 27 29.87 24.03 29.87SD 5.1 5.1 5.1 5.10 5.10 TTL_(MIN) 25.07 29.34 29.52 25.07 29.52TTL_(MAX) 25.31 29.99 33.22 25.27 33.22 BFL_(MIN) 1.47 2.71 10.22 1.4710.22 BFL_(MAX) 5.16 7.93 10.22 5.16 10.22 DA_(MIN) 4.07 3.85 2.95 2.954.07 DA_(MAX) 5.17 5.79 6.69 5.17 6.69 HA_(MIN) 4.07 3.85 2.95 2.95 4.07HA_(MAX) 5.17 5.79 6.69 5.17 6.69 F/#_(MIN) 2.36 2.59 3.38 2.36 3.38F/#_(MAX) 4.64 4.66 4.46 4.46 4.66 Δd 0.23 0.66 3.70 0.23 3.70 S_(G24)3.69 5.21 0.00 0.00 5.21 S_(G13) 0.23 0.66 3.70 0.23 3.70 Lens power(+−)(−−) (+−)(−+) (−+)(+−−) sequence (+++)(+−+) (+−+)(+−+) (++−)(−+)Lens group power +−++ +−++ +−++ sequence T_(Lens, MIN) 19.912 21.41019.296 19.30 21.41 T_(Lens, MAX) 23.600 26.623 22.999 23.00 26.62 N_(G1)2 2 2 2 2 N_(G2) 2 2 3 2 3 N_(G3) 3 3 3 3 3 N_(G4) 3 3 2 2 3 EFL_(G1)19.27 17.82 16.10 16.10 19.27 EFL_(G2) −5.81 −5.62 −3.96 −5.81 −3.96EFL_(G3) 6.02 7.15 5.59 5.59 7.15 EFL_(G4) 14.24 305.70 154.50 14.24305.70 T_(G1) 2.25 1.50 3.11 1.50 3.11 T_(G2) 1.25 1.91 2.60 1.25 2.60T_(G3) 5.49 5.01 3.25 3.25 5.49 T_(G4) 5.68 4.97 4.96 4.96 5.68HFOV_(MIN) 6.06 5.36 5.62 5.36 6.06 HFOV_(MAX) 13.97 14.63 17.02 13.9717.02 H_(M) 6.20 6.20 6.20 6.20 6.20 EFL_(MAX)/EFL_(MIN) 2.50 2.71 2.992.50 2.99 F/#_(MAX)/F/#_(MIN) 1.97 1.80 1.32 1.32 1.97 DA_(MIN)/DA_(MAX)0.79 0.66 0.44 0.44 0.79 TTL_(MIN)/TTL_(MAX) 0.99 0.98 0.89 0.89 0.99TTL_(MAX)/EFL_(MAX) 1.05 1.11 1.11 1.05 1.11 S_(G24)/S_(G13) 15.95 7.940.00 0.00 15.95 R 3.91 3.27 5.37 3.27 5.37 Δd/T_(Lens, Min) 0.012 0.0300.192 0.012 0.192 Δd/T_(Lens, Max) 0.010 0.025 0.161 0.010 0.161 T(G1,G2)_(MIN) 1.25 1.50 2.60 1.25 2.60 T(G1, G2)_(MAX) 2.25 1.91 3.11 1.913.11 T(G3, G4)_(MIN) 5.49 4.97 3.25 3.25 5.49 T(G3, G4)_(MAX) 5.68 5.014.96 4.96 5.68 T(G1, G2)_(MIN)/ 0.56 0.78 0.84 0.56 0.84 T(G1, G2)_(MAX)T(G3, G4)_(MIN)/ 0.97 0.99 0.66 0.66 0.99 T(G3, G4)_(MAX) T(G1,G2)_(MAX)/ 0.41 0.39 0.96 0.39 0.96 T(G3, G4)_(MIN)

In particular, in embodiments disclosed herein, the following ranges aresupported:

-   -   EFL_(MIN)≥9.00 mm;    -   24.00 mm≤EFL_(MAX)≤30 mm;    -   EFL_(MIN)≤EFL≤EFL_(MAX),    -   5.00 mm<DA_(MAX)<7.00 mm;    -   2.30≤F/#_(MIN)<4.00, 4.40<F/#_(MAX)<6;    -   2.50≤EFL_(MAX)/EFL_(MIN)≤2.99;    -   1.30≤F/#_(MAX)/F/#_(MIN)≤3.00.

FIG. 2A shows yet another embodiment of a FCZT camera module disclosedherein and numbered 200 in a perspective view. FIG. 2B shows cameramodule 200 in a side view. FIG. 2C shows camera module 200 in a firstexploded view, and FIG. 2D shows camera module 200 in a second explodedview.

Camera module 200 comprises an OPFE module 210 with an OPFE 204 (e.g. aprism) that folds the light from OP1 to OP2, and a lens 206 divided intofour lens groups G1-G4 included in four lens barrel sections (the barrelsections named after the group number), respectively G1 barrel 212, G2barrel 214, G3 barrel 216 and G4 barrel 218 (see FIGS. 2C-D). Cameramodule 200 further comprises a housing 202, a top shield 203, a firstflex 240 (e.g. a flexible printed circuit board or “flex PCB”), a secondflex 245 (e.g. a flex PCB), a sensor module 250 that includes an imagesensor 208, and an optional optical element (not shown). Housing 202includes a first yoke 213 and a second yoke 215 (see e.g. FIG. 4B). Flex240 additionally includes a pitch coil 243 and two yaw coils, a firstyaw coil 245 and a second yaw coil 247.

G1 barrel 212 and G3 barrel 216 are included in a “G13 carrier” 220, andG2 barrel 214 and G4 barrel 218 are included in a “G24 carrier” 230. Thetwo barrels included in each of G13 carrier 220 and G24 carrier 230 donot move with respect to each other, but only with respect to the twobarrels included in the other of G24 carrier 230 and in G13 carrier 220,as well as with respect to image sensor 208. Flex 240 includes a coil242 and a position sensor 225 (FIG. 4H), e.g. a Hall sensor. G13 carrier220 includes an “actuation” magnet 222 and a “position” magnet 224 thatform, together with coil 242 and position sensor 225, a “G13 carrierVCM” that actuates G13 carrier 220 with respect to image sensor 208. G13carrier VCM is a closed-loop VCM. Actuation magnet 222 and coil 242 forman actuation unit, and position magnet 224 and position sensor 225 forma position sensing unit. The actuation of G13 carrier 220 with respectto image sensor 208 may be along the optical axis of lens 206 and over arelatively small stroke of 0.5 mm-5 mm. In the example shown, theactuation of G13 carrier 220 is over a stroke of about 1.7 mm. Flex 245includes a coil assembly (“CA”) 246 and a Hall sensor 248. CA 246 mayinclude 2 or more coils. G24 carrier 230 includes a magnet assembly(“MA”) of three or more magnets which forms, together with CA 246 andHall sensor 248, a “G24 carrier VCM” that actuates G24 carrier 230 withrespect to image sensor 208. The G24 carrier VCM may additionallyinclude a position sensing unit for controlling an actuation of G24carrier 230 with respect to image sensor 208. G24 carrier VCM” is a“large stroke” VCM for performing large stroke movements as describedabove or below, as e.g. described in PCT/IB2021/056693. G24 carrier VCMis a closed-loop VCM.

The actuation of G24 carrier 230 with respect to image sensor 208 may bealong the optical axis of lens 206 and over a relatively large stroke of2.0 mm-15 mm. In the example shown, the actuation of G24 carrier 230 isover a stroke of about 6.2 mm. Because the G24 carrier moves along arelatively large stroke and the G13 carrier moves along a relativelysmall stroke, camera module 200 is referred to as a “G24 FCZT cameramodule”. A G24 FCZT camera module may include a G24 FCZT camera (FIGS.1B-C).

Camera module 200 has a module height H_(M) and includes a cameraaperture 209 with an aperture height H_(A). Module height H_(M) andaperture height H_(A) are both measured along the Y-axis in thecoordinate system shown in FIG. 2B (i.e., along OP1). Aperture heightH_(A) is determined by the optical height (“H_(L)”—see FIG. 6A, FIG. 9 )of the lens element that determines an aperture stop of camera 200. Forexample, H_(M) may be 6.2 mm and H_(A) may be 5.0 mm. In general, H_(M)may be in the range H_(M)=5 mm-15 mm and H_(A) may be in the rangeH_(A)=3 mm-10 mm. Module length L_(M) may be about 40 mm, in general 25mm-60 mm.

Lens 206 may be a “cut” (or “D-cut”) lens as known in the art and shownin FIG. 2E, which shows a cut lens 260. Cut lens 260 is cut along anaxis parallel to the x axis at the sides marked 262 and 264. At thesides marked 266 and 268, lens 260 is not cut. Therefore, lens 260 hasan optical lens width W_(L) (measured along the x axis) which is largerthan its optical lens height H_(L) (measured along the Y-axis). Using acut lens such as lens 260 is beneficial in folded cameras, as itsupports slim camera height while still providing a relatively largeaperture area (AA) of AA>H_(L2) and AA>(H_(L)/2)²−π. For a lens elementthat determines the aperture of a camera, the optical lens height andwidth is equivalent to the height and the width of the aperture of thelens, i.e. H_(L)=H_(A) and W_(L)=W_(A). G4 included in G4 barrel 218 maybe cut, meaning that W_(A)>H_(A) is fulfilled, as shown in FIG. 5A.

A cut lens has one or more lens elements Li that are cut, i.e. that havean optical width (“W_(Li)”) measured along a first axis perpendicular tothe lens optical axis that is larger than an optical height (“H_(Li)”)measured along a second axis perpendicular to the lens optical axis,i.e. W_(Li)>H_(Li). For example, a D-cut ratio of a cut lens may be0%-50%, meaning that W_(Li) may be larger than H_(Li) by 0%-50%, i.e.The cutting may reduce module height H_(M) of the camera module above.This allows to realize a slim FCZT camera having a low H_(M) to renderit compatible with smartphone size constraints and having a relativelylarge aperture area, which is beneficial for achieving a low F/# camerahaving a relatively large signal-to-noise ratio (“SNR”). One may referto the difference between H_(M) and H_(A) as a “height penalty” (“P”) ofthe camera module, where P is to be minimized for a slim camera withrelatively large SNR. Further design choices for minimizing penalty Pare:

-   -   Top shield 203 may be made of metal and may have a low height        (measured along the y-axis) or thickness of about 0.05 mm-0.25        mm, and in particular about 0.1 mm-0.2 mm.    -   Yoke 213 and Yoke 215 are located at a bottom part of housing        202 with lowest height (measured along the Y-axis) or thickness.        Yoke 213 and Yoke 215 may be made of a magnetic metal and may        have a low height of about 0.05 mm-0.25 mm.    -   A height of G13 carrier 220 and G24 carrier 230 is determined by        H_(L). That is, G13 carrier 220 and G24 carrier 230 do not        include any additional parts that have a height that exceeds the        height of a G1 barrel 212, a G2 barrel 214, G3 barrel 216 and G4        barrel 218. For example, the height of G1 barrel 212 is given by        the sum of H_(L) and twice the G1 barrel thickness of e.g. 0.1        mm-0.5 mm.    -   H_(M) is determined by the heights of G13 carrier 220 and G24        carrier 230. H_(M) is given by a largest height of G13 carrier        220 or G24 carrier 230 plus two thin air gaps having an air gap        height of about 0.1 mm (a first air gap being located between        G13 carrier 220 and top shield 203, a second air gap being        located between G13 carrier 220 and housing 202) plus the        thickness of top shield 203 and plus the thickness of housing        202.        Prism 204 may be a cut prism as known in the art, as shown        exemplarily in FIG. 2F, which shows a cut prism numbered 270.        Cut prism 270 is cut along an axis parallel to the x axis at the        side marked 274. At the side marked 272, prism 270 is not cut.        As shown, an optical width of cut prism 270 (“W_(P)”, measured        along the x axis) is larger than an optical height of cut prism        270 (“H_(P)”, measured along the Y-axis) by 0%-50% (this        representing a D-cut ratio). A cut prism may be beneficial for        obtaining a slim camera having a low camera height that still        lets in a relatively large amount of light.

FIG. 3A shows camera module 200 from FIGS. 2A-2D in a perspective viewand without top shield 203. FIG. 3B shows camera module 200 without topshield 203 from FIG. 3A in an exploded view.

FIG. 4A shows camera module 200 in a bottom view and with flex 240partly removed for exposing pitch coil 243, pitch position sensor 302 aswell as two yaw coils 245 and 247 and yaw position sensor 304. Yoke 213and yoke 215 are visible.

FIG. 4B shows camera module 200 in a bottom view and with flex 240 aswell as pitch coil 243, pitch position sensor 302, yaw coils 245 and 247and yaw position sensor 304 partly removed for exposing pitch magnet 306as well as two yaw magnets 308 and 312. Pitch coil 243, pitch positionsensor 302 and pitch magnet 306 form together a, “first OIS VCM” forperforming optical image stabilization (OIS) around a first OIS rotationaxis. Yaw coils 245 and 247, yaw position sensor 304 and yaw magnets 308and 312 form together a “second OIS VCM” for performing OIS around asecond OIS rotation axis. First OIS rotation axis is perpendicular toboth OP1 and OP2, second OIS rotation axis is parallel to OP1.

FIG. 4C shows OPFE module 210 in a perspective top view. FIG. 4D showsOPFE module 210 in a perspective bottom view.

FIG. 4E shows G13 carrier 220 in a perspective bottom view.

FIG. 4F shows G13 carrier 220 in a bottom view. G13 carrier 220 includesa preload magnet 229 which is attracted to yoke 215. G13 carrier 220additionally includes two grooved rails 228-1 and 228-2 and two flatrails 226-1 and 226-2.

FIG. 4G shows G24 carrier 230 in a perspective top view. G24 carrier 230includes a preload magnet 232 which connects to yoke 213. G24 carrier230 additionally includes two grooved rails 234-1 and 234-2 and twogrooved rails 236-1 and 236-2 and magnet assembly 402.

Grooved rails 234-1, 234-2, 236-1 and 236-2 in G24 carrier 230 andgrooved rails 226-1 and 226-2 and flat rails 228-1 and 228-2 in G13carrier 220 include balls, so that they form ball-groove mechanisms thatallow G13 carrier 220 to move on top of and relative to G24 carrier 230and relative to image sensor 208 by means of G13 carrier VCM. G24carrier 230 moves relative to G13 carrier 220 and relative to imagesensor 208 by means of G24 carrier VCM.

FIG. 4H shows position magnet 224 included in G13 carrier 220 in aperspective view. Position sensor 225 included in flex 240 is alsoshown. Together, position magnet 224 and position sensor 225 form aposition sensing unit 410 that controls the actuation of G13 carrier220. Position sensing unit 410 is a large stroke position sensing unitas known in the art and e.g. described in PCT/IB2021/056693.

FIG. 5A shows components of FCZT camera module 200 in a minimum zoomstate in a perspective view. In this example, in the minimum zoom statewith ZF_(MIN), EFL_(MIN) may be ≥9 mm and a minimal F/# may beF/#M_(MIN)≥2.3. G4 included in G4 barrel 218 may be a cut (or D-cut)lens as known in the art, i.e. G4 may have an optical lens width (W_(L))and an optical lens height (H_(L)) that fulfill W_(L)>H_(L). In otherexamples, further lens groups or all lens groups may be D-cut.

FIG. 5B shows components of FCZT camera module 200 in an intermediatezoom state in a perspective view. In this intermediate zoom state havingsome zoom factor ZF_(INT), an EFL_(INT) may be 16 mm.

FIG. 5C shows components of FCZT camera module 200 in a maximum zoomstate in a perspective view. In this example, in the maximum zoom statehaving a maximum zoom factor ZF_(MAX), an EFL_(MAX) may be 24 mm-30 mmand a maximal F/# may be F/#_(MAX)<6.

In a “G13 FCZT camera module” including a G13 FCZT camera (FIGS. 1D-E),the G13 carrier moves along a relatively large stroke and the G24carrier moves along a relatively small stroke. Based on G24 FCZT cameramodule 200, a G13 FCZT camera module may be realized by exchanging G24carrier VCM and G13 carrier VCM, i.e. the large stroke G24 carrier VCMmay be used to actuate a G13 carrier such as G13 carrier 220 over arelatively large stroke, and the G13 carrier VCM may be used to actuatea G24 carrier such as G24 carrier 230 over a relatively small stroke. Inthe G13 FCZT camera module, a yoke that attracts G24 carrier 230 such asyoke 213 and a yoke that attracts G13 carrier 220 such as yoke 215respectively may be located at positions different than the ones shownfor G24 FCZT camera module 200.

FIGS. 6A-6B show a G24 optical lens system disclosed herein and numbered600 which may be included into a G24 FCZT camera like camera 160. FIG.6A shows optical lens system 600 in a first, minimal zoom state havingan EFL_(MIN)=9.6 mm. FIG. 6B shows optical lens system 600 in a second,maximum zoom state having an EFL_(MAX)=24.0 mm. The transition orswitching from EFL_(MAX) to EFL_(MIN) or vice versa can be performedcontinuously, i.e. a FCZT camera such as FCZT camera 160 includingsystem 600 can be switched to any other EFL that satisfiesEFL_(MIN)≤EFL≤EFL_(MAX).

Optical lens system 600 comprises a lens 604 having a lens optical axis602, an (optional) optical element 606 and an image sensor 608. System600 is shown with ray tracing. Optical element 606 may be for example aninfra-red (IR) filter, and/or a glass image sensor dust cover. Like lens164, lens 604 is divided into four lens groups G1, G2, G3 and G4. G1includes (in order from an object to an image side of optical system600) lens elements L1-L2, G2 includes L3-L4, G3 includes L5-L7 and G4includes L8-L10. The lens elements included in each lens group arefixedly coupled to each other. Distances between the lens groups aremarked d4 (between G1 and G2), d8 (between G2 and G3), d14 (between G3and G4) and d20 (between G4 and optical element 606). Lens 604 includesa plurality of N lens elements L_(i). In lens 604, N=10. L₁ is the lenselement closest to the object side and L_(N) is the lens element closestto the image side, i.e. the side where the image sensor is located. Thisorder holds for all lenses and lens elements disclosed herein. Each lenselement L_(i) comprises a respective front surface S_(2i-1) (the index“2i−1” being the number of the front surface) and a respective rearsurface S_(2i) (the index “2i” being the number of the rear surface),where “i” is an integer between 1 and N. This numbering convention isused throughout the description. Alternatively, as done throughout thisdescription, lens surfaces are marked as “S_(k)”, with k running from 1to 2N.

It is noted that G24 optical lens system 600 as well as all otheroptical lens systems disclosed herein are shown without D-cut.

Detailed optical data and surface data for system 600 are given inTables 2-4. The values provided for these examples are purelyillustrative and according to other examples, other values can be used.

Surface types are defined in Table 2. “Stop” in the Comment column ofTable 2 indicates where the aperture stop of the lens is located. Thecoefficients for the surfaces are defined in Table 4. The surface typesare:

-   -   a) Plano: flat surfaces, no curvature    -   b) Q type 1 (QT1) surface sag formula:

$\begin{matrix}{{z(r)} = {\frac{cr^{2}}{1 + \sqrt{1 - {\left( {1 + k} \right)c^{2}r^{2}}}} + {D_{con}(u)}}} & \left( {{Eq}.1} \right)\end{matrix}$${D_{con}(u)} = {u^{4}{\sum}_{n = 0}^{N}A_{n}{Q_{n}^{con}\left( u^{2} \right)}}$${u = \frac{r}{r_{notm}}},{x = u^{2}}$ Q₀^(con)(x) = 1Q₁^(con) = −(5 − 6x) Q₂^(con) = 15 − 14x(3 − 2x)Q₃^(con) = −{35 − 12x[14 − x(21 − 10x)]}Q₄^(con) = 70 − 3x{168 − 5x[84 − 11x(8 − 3x)]}Q₅^(con) = −[126 − x(1260 − 11x{420 − x[720 − 13x(45 − 14x)]})]

-   -   c) Even Asphere (ASP) surface sag formula:

$\begin{matrix}{{z(r)} = {\frac{cr^{2}}{1 + \sqrt{1 - {\left( {1 + k} \right)c^{2}r^{2}}}} + {\alpha_{1}r^{2}} + {\alpha_{2}r^{4}} + {\alpha_{3}r^{6}} + {\alpha_{4}r^{8}} + {\alpha_{5}r^{10}} + {\alpha_{6}r^{12}} + {\alpha_{7}r^{14}} + {\alpha_{8}r^{16}}}} & \left( {{Eq}.2} \right)\end{matrix}$

where {z, r} are the standard cylindrical polar coordinates, c is theparaxial curvature of the surface, k is the conic parameter, r_(norm) isgenerally one half of the surface's clear aperture, and An are thepolynomial coefficients shown in lens data tables. The Z axis ispositive towards image. Values for optical lens diameter D are given asa clear aperture radius, i.e. D/2. The reference wavelength is 555.0 nm.Units are in mm except for refraction index (“Index”) and Abbe #. TheFOV is given

TABLE 2 Optical lens system 600 EFL = see Table 3, F number (F/#) = seeTable 3, HFOV = see Table 3. Surface Curvature Aperture Radius AbbeFocal # Comment Type Radius Thickness (D/2) Material Index # Length 1Lens 1 ASP 7.450 1.153 3.052 Plastic 1.54 55.93 11.32 2 −34.276 0.1722.947 3 Lens 2 ASP 45.190 0.633 2.778 Plastic 1.64 23.52 −24.24 4 11.541See Table 3 2.532 5 Lens 3 - Stop ASP −20.726 0.330 1.744 Plastic 1.5355.69 −8.57 6 5.941 0.268 1.787 7 Lens 4 ASP −24.974 0.330 1.820 Plastic1.54 55.93 −19.01 8 17.846 See Table 3 1.859 9 Lens 5 ASP 9.996 1.0813.044 Plastic 1.54 55.93 14.22 10 −33.512 0.050 3.052 11 Lens 6 ASP3.419 1.515 3.000 Plastic 1.53 55.69 46.94 12 3.344 0.783 2.665 13 Lens7 ASP 4.078 1.753 2.558 Plastic 1.54 55.93 11.42 14 9.992 See Table 32.371 15 Lens 8 ASP −24.642 0.805 2.357 Plastic 1.54 55.93 18.31 16−7.196 0.170 2.385 17 Lens 9 ASP −3.838 0.740 2.354 Plastic 1.61 25.59−4.67 18 12.572 1.919 2.510 19 Lens 10 ASP 20.787 1.753 2.943 Plastic1.54 55.93 6.59 20 −4.225 See Table 3 3.052 21 Filter Plano Infinity0.179 — Glass 1.52 64.17 22 Infinity 0.255 — 23 Image Plano Infinity — —as half FOV (HFOV). The definitions for surface types, Z axis, CAvalues, reference wavelength, units, focal length and HFOV are valid forall further presented tables.

TABLE 3 EFL = 9.61 EFL = 24.03 Surface 4 0.911 4.599 Surface 8 4.2510.563 Surface 14 1.296 4.984 Surface 20 4.729 1.041 F/# 2.36 4.64 HFOV[deg] 13.97 6.06

TABLE 4 Aspheric Coefficients Surface # Conic A4 A6 A8 1 0 −3.70E−04−5.26E−06   8.06E−06 2 0 −2.58E−03 4.80E−04 −1.90E−05 3 0 −2.11E−034.44E−04 −2.96E−05 4 0  4.81E−04 −2.21E−05  −4.56E−06 5 0 −6.37E−03−4.24E−04   1.71E−04 6 0 −4.82E−03 9.68E−05  3.10E−04 7 0  1.23E−027.83E−04 −6.36E−06 8 0  8.17E−03 3.87E−04 −1.27E−04 9 0 −2.42E−041.75E−04 −9.31E−06 10 0 −3.48E−03 5.11E−04 −2.23E−05 11 0 −4.29E−03−3.89E−05   9.66E−07 12 0 −7.52E−03 −8.80E−04   5.68E−05 13 0 −8.79E−03−1.91E−04  −3.47E−05 14 0 −4.07E−04 2.60E−04 −1.49E−05 15 0 −9.69E−035.18E−04  3.09E−05 16 0 −1.72E−02 1.23E−03 −2.91E−05 17 0 −4.98E−034.71E−04  2.44E−05 18 0 −3.02E−03 −2.43E−04   5.41E−05 19 0 −1.10E−03−1.75E−04   1.09E−05 20 0  3.79E−03 −1.10E−04   7.80E−06

Movements between the lens groups required for continuously switchinglens 604 between EFL_(MIN) and EFL_(MAX) as well as F/# and HFOV aregiven in Table 3. Note that here and in other optical lens systemsdisclosed herein, the F/# can be increased by further closing the lensaperture. For switching lens 604 any state between the extreme statesEFL_(MIN) and EFL_(MAX), a maximum movement (or stroke “s”) of G24 lensgroup S=3.69 mm is required, as detailed in Table 1. A ratio R of theEFL differences in the extreme states and S isR=(EFL_(MAX)−EFL_(MIN))/S=3.91, as well detailed in Table 1. MaximizingR is desired, as, (1) for a given ZF range, determined by EFL_(MAX)EFL_(MIN), a smaller stroke S is required for switching betweenEFL_(MAX) and EFL_(MIN), or, (2) for a given stroke S, a larger ZFrange, determined by EFL_(MAX)−EFL_(MIN), is provided. In addition,G1+G2+G3+G4 together must be moved as one lens with respect to imagesensor 608 as specified in FIG. 6C. FIG. 6C gives the values for Δd, asdefined in FIGS. 1B-1C. As visible, Δd<0.25 mm. A small Δd isbeneficial.

L1, L2 are uniformly close to each other. A lens pair L_(i), L_(i+1) is“uniformly close to each other”, if for all values between OA and DA/2(i.e. a margin of L_(i) or L_(i+1)) along the y-axis, the lens pairfulfils all of these three criteria:

-   -   1. A maximum distance (“Max-d”) between L_(i) and L_(i+1)        measured along the z-axis at any position along the y-axis is        Max-d_(Li-Li+1)<0.5 mm.    -   2. An average of the distance between L_(i) and L_(i+1)        (“μ_(Li−Li+1)”) measured along the z-axis is μ_(Li−Li+1)<0.25        mm,    -   3. A standard deviation of the average μ_(Li−Li+1)        (“σ_(Li−Li+1)”) is σ_(Li−Li+1)<0.1 mm. Lens pair L1, L2 is a        “doublet lens”, what is beneficial for achieving low chromatic        aberration.        Herein, a lens pair L_(i), L_(i+1) is defined a “doublet lens”        if it fulfils all of these three criteria:    -   1. Lens pair L_(i), L_(i+1) is uniformly close to each other        according to above definition,    -   2. The ratio of the refractive index (“n”) of L_(i), L_(i+1) is        n_(i+1)≥n_(i)+0.03,    -   3. The ratio of the Abbe number (“v”) is v_(i)/v_(i+1)>1.4.        Herein, a lens pair L_(i), L_(i+1) is defined an “inverted        doublet lens”, if it fulfils all of these three criteria:    -   1. Lens pair L_(i), L_(i+1) is uniformly close to each other,    -   2. The ratio of the refractive index (“n”) of L_(i), L_(i+1) is        n_(i)≥n_(i+1)+0.03,    -   3. The ratio of the Abbe number (“v”) is v_(i+1)/v_(i)>1.4.        Table 5 shows all doublet lenses and inverted doublet lenses        that are included in the optical lens system examples 600-800        disclosed herein as well as values thereof (Max-d, μ, σ given in        mm, n and v given without units). “Type” specifies whether the        lens pair is a doublet lens (“D”) or an inverted doublet lens        (“ID”).

TABLE 5 600 600 700 700 700 700 800 800 800 Lens pair L1, L2 L8, L9 L1,L2 L3, L4 L6, L7 L8, L9 L1, L2 L3, L4 L7, L8 Type D D D D ID D ID ID DMax-d 0.345 0.170 0.062 0.195 0.064 0.346 0.145 0.185 0.265 μ_(Li−Li+1)0.237 0.106 0.050 0.141 0.045 0.231 0.130 0.073 0.109 σ_(Li−Li+1) 0.0570.044 0.010 0.042 0.012 0.095 0.019 0.024 0.060 n_(i) 1.54 1.54 1.541.54 1.61 1.54 1.64 1.67 1.53 n_(i+1) 1.64 1.61 1.67 1.67 1.53 1.61 1.541.54 1.67 v_(i) 55.93 55.93 55.93 55.93 25.59 55.93 23.52 19.24 55.69v_(i+1) 23.52 25.59 19.24 19.24 55.69 25.59 55.93 55.93 19.24 n_(i) −n_(i+1) −0.1 −0.07 −0.13 −0.13 0.08 −0.07 0.1 0.13 −0.14 v_(i)/v_(i+1)2.38 2.19 2.91 2.91 2.19 2.89 v_(i+1)/v_(i) 2.18 2.38 2.91

FIGS. 7A-7B3 show another G24 optical lens system 700 disclosed hereinthat may be included into a G24 FCZT camera like camera 160. FIG. 7Ashows optical lens system 700 in a minimal zoom state having anEFL_(MIN)=9.96 mm. FIG. 7B shows optical lens system 700 in a maximumzoom state having an EFL_(MAX)=27.0 mm. The transition or switching fromEFL_(MAX) to EFL_(MIN) or vice versa can be performed continuously.

Optical lens system 700 comprises a lens 704 having a lens optical axis702, an (optional) optical element 706 and an image sensor 708. System700 is shown with ray tracing. Lens 704 is divided into G1, G2, G3 andG4. G1 includes L1-L2, G2 includes L3-L4, G3 includes L5-L7 and G4includes L8-L10.

Detailed optical data and surface data for system 700 are given inTables 6-8. Surface types are defined in Table 6. Movements between thelens groups required for continuously switching lens 704 betweenEFL_(MIN) and EFL_(MAX) as well as F/# and HFOV are given in Table 7.The coefficients for the surfaces are defined in Table 8.

TABLE 6 Optical lens system 700 EFL = see Table 7, F number = see Table7, HFOV = see Table 7. Surface Curvature Aperture Radius Abbe Focal #Comment Type Radius Thickness (D/2) Material Index # Length 1 Lens 1 ASP10.760 1.114 3.03 Plastic 1.544 55.933 11.31 2 −13.957 0.037 2.98 3 Lens2 ASP −15.044 0.346 2.95 Plastic 1.671 19.239 −29.90 4 −59.099 See Table7 2.90 5 Lens 3 ASP −5.658 0.664 2.03 Plastic 1.544 55.933 −3.91 6 3.5760.195 1.91 7 Lens 4 - Stop ASP 6.437 0.527 1.92 Plastic 1.671 19.23913.61 8 20.638 See Table 7 1.90 9 Lens 5 ASP 6.779 1.601 3.11 Plastic1.544 55.933 9.67 10 −21.887 0.615 3.11 11 Lens 6 ASP 11.188 0.913 3.01Plastic 1.614 25.587 −10.93 12 4.082 0.064 2.96 13 Lens 7 ASP 4.7321.815 2.99 Plastic 1.535 55.686 7.16 14 −17.663 See Table 7 2.97 15 Lens8 ASP −14.688 1.363 2.63 Plastic 1.544 55.933 49.56 16 −9.833 0.346 2.6417 Lens 9 ASP −4.622 0.591 2.62 Plastic 1.614 25.587 −9.13 18 −26.6800.614 2.67 19 Lens 10 ASP −16.100 1.845 2.96 Plastic 1.588 28.365 13.3720 −5.528 See Table 7 2.994 21 Filter Plano Infinity 0.179 — Glass 1.5264.17 22 Infinity 2.55E−01 — 23 Image Plano Infinity — —

TABLE 7 EFL = 9.96 EFL = 27.00 Surface 4 0.756 5.969 Surface 8 5.3570.145 Surface 14 2.647 7.859 Surface 20 7.492 2.279 F/# 2.59 4.66 HFOV[deg] 14.63 5.36

TABLE 8 Aspheric Coefficients Surface # Conic A4 A6 A8 A10 A12 A14 1 0−2.09E−04 −6.72E−06   1.84E−06 −3.40E−07  3.13E−09 0.00E+00 2 0−1.69E−03 3.59E−04 −2.62E−05  1.51E−07  1.30E−08 0.00E+00 3 0 −1.49E−032.71E−04 −1.64E−05  9.36E−08 −7.70E−09 0.00E+00 4 0 −2.25E−04 −3.76E−05  8.14E−06 −4.38E−07 −1.22E−08 0.00E+00 5 0 −3.66E−03 1.39E−03 −1.37E−04 5.24E−06 −5.29E−07 7.11E−08 6 0 −3.95E−03 7.26E−06 −5.42E−05  2.91E−05−3.70E−06 2.61E−08 7 0  9.60E−03 −9.24E−04  −9.52E−05  4.31E−05−5.81E−06 8.74E−08 8 0  5.80E−03 1.94E−04 −1.54E−04  2.15E−05 −3.42E−061.09E−07 9 0 −8.05E−04 −4.67E−05   2.59E−06 −6.62E−07  6.21E−08 0.00E+0010 0 −5.30E−03 3.88E−04 −1.44E−05 −4.50E−08  4.55E−08 0.00E+00 11 0−8.55E−03 4.35E−04  1.11E−05 −8.55E−07 −1.02E−08 0.00E+00 12 0 −7.01E−03−3.12E−05   4.38E−05 −1.70E−06 −4.98E−08 0.00E+00 13 0 −3.56E−03−1.54E−04   3.94E−05 −3.53E−07 −6.70E−08 0.00E+00 14 0 −1.16E−035.73E−05  1.34E−05 −1.43E−06  8.89E−08 0.00E+00 15 0  1.57E−03 1.34E−05−4.86E−05  3.67E−06  2.84E−09 0.00E+00 16 0  6.54E−03 −6.95E−05 −6.95E−05 −1.20E−06 −8.19E−08 0.00E+00 17 0  8.78E−03 −7.15E−05 −3.75E−05  4.84E−07 −3.42E−07 0.00E+00 18 0  5.05E−03 2.13E−04  3.57E−06 2.67E−07  0.00E+00 0.00E+00 19 0  3.99E−03 1.93E−04  1.99E−05 −1.52E−06 2.39E−08 −1.87E−09  20 0  2.47E−03 −1.65E−05   1.47E−05 −5.58E−07 4.20E−08 4.51E−10

FIGS. 8A-8C show a G13 optical lens system 800 disclosed herein that maybe included into a G13 FCZT camera like camera 170. FIG. 8A showsoptical lens system 800 in a minimal zoom state having an EFL_(MIN)=10mm. FIG. 8B shows optical lens system 800 in an intermediate zoom statehaving an EFL_(MID)=20 mm. FIG. 8C shows optical lens system 800 in amaximum zoom state having an EFL_(MAX)=30 mm. The transition orswitching from EFL_(MAX) to EFL_(MIN) or vice versa can be performedcontinuously.

Optical lens system 800 comprises a lens 804 having a lens optical axis802, an (optional) optical element 806 and an image sensor 808. System800 is shown with ray tracing. Lens 804 is divided into G1, G2, G3 andG4. G1 includes L1-L2, G2 includes L3-L5, G3 includes L6-L8 and G4includes L9-L10.

Detailed optical data and surface data for system 800 are given inTables 9-11. Surface types are defined in Table 9. Movements between thelens groups required for continuously switching lens 804 betweenEFL_(MIN) and EFL_(MAX) as well as F/# and HFOV are given in Table 10.The coefficients for the surfaces are defined in Table 11.

TABLE 9 Optical lens system 800 EFL = see Table 10, F number = see Table8, HFOV = see Table 10. Group Lens Surface Type R [mm] T [mm] D [mm] NdVd Focal Length [mm] Object S₀ Flat Infinity Infinity G1 L1 S₁ QTYP9.6942 1.2175 3.5801 1.6392 23.5174 −24.5407 16.1040 S₂ QTYP 5.71300.1359 3.1917 L2 S₃ QTYP 5.1388 1.7544 3.2006 1.5443 55.9329 9.3046 S₄QTYP −397.6066 See 3.1068 Table 10 G2 L3 S₅ QTYP −33.5732 0.7020 2.49491.6707 19.2389 10.1444 −3.9604 S₆ QTYP −5.7492 0.0500 2.4513 L4 S₇ QTYP−13.3042 0.3300 2.2940 1.5443 55.9329 −5.5391 S₈ QTYP 3.9491 1.09541.8547 L5 S₉ QTYP −7.9227 0.3300 1.7701 1.5443 55.9329 −6.2960 S₁₀ QTYP6.1633 See 1.9220 Table 10 G3 L6 S₁₁ (Stop) QTYP 7.0120 0.9445 2.04131.5443 55.9329 8.8606 5.5857 S₁₂ QTYP −14.8678 0.0500 2.1842 L7 S₁₃ QTYP12.2606 1.2768 2.3475 1.5348 55.6857 6.8071 S₁₄ QTYP −5.0129 0.05002.3504 L8 S₁₅ QTYP −7.3898 0.8705 2.2903 1.6707 19.2389 −13.2301 S₁₆QTYP −44.2657 See 2.1933 Table 10 G4 L9 S₁₇ QTYP −8.3488 1.2159 2.22121.6142 25.5871 −10.1466 154.5022 S₁₈ QTYP 26.6866 1.7515 2.3750 L10 S₁₉QTYP −500.5411 1.7510 3.0147 1.5875 28.3647 12.7415 S₂₀ QTYP −7.43119.7121 3.0029 Glass window S₂₁ Flat Infinity 0.2100 1.5168 64.1673 S₂₂Flat Infinity 0.3000 Image sensor S₂₃

TABLE 10 Configuration 1 Configuration 2 Configuration 3 EFL = 10 [mm]EFL = 20 [mm] EFL = 30 [mm] T [mm] S₄ 0.5551 2.9477 4.2581 S₁₀ 4.20051.8079 0.4975 S₁₆ 1.0154 3.4080 4.7184 F/# 3.38 4.08 4.46 HFOV 17.028.43 5.62

TABLE 11 Conic Surface (k) NR A₀ A₁ A₂ A₃ A₄ A₅ A₆ S₁ 0 3.5800E+001.1491E−01 −2.8917E−02  1.7143E−03 −2.5910E−04   6.5830E−05 3.1372E−06−8.1380E−06 S₂ 0 3.2404E+00 2.0800E−01 −4.4183E−02  7.7743E−04−8.8972E−05   5.6426E−05 1.1177E−05  5.1629E−05 S₃ 0 3.2513E+00−1.7304E−02  −2.3956E−02 −4.6667E−04 2.7248E−04  3.7931E−05 1.9795E−05−4.8777E−05 S₄ 0 3.1457E+00 −9.4934E−02   4.7895E−03 −5.9032E−043.3997E−04 −2.8749E−05 1.5586E−05 −8.2102E−07 S₅ 0 2.3902E+00 1.3198E−01−3.8200E−02 −8.8324E−03 −1.6995E−03   4.5851E−04 2.0698E−04  5.0679E−05S₆ 0 2.2470E+00 1.5614E−01 −1.2560E−02 −3.1075E−03 −5.3334E−04  1.2627E−04 2.1103E−05  1.0284E−05 S₇ 0 2.2051E+00 −1.0725E−01  7.6028E−02 −6.0832E−03 3.0963E−03 −4.9030E−04 1.7973E−04 −2.0049E−05 S₈0 1.8535E+00 −1.6541E−01   2.2861E−02 −2.5045E−03 8.2602E−04 −2.7614E−049.7694E−06 −2.7978E−06 S₉ 0 1.8405E+00 −3.4565E−01   1.6856E−02−4.3840E−03 4.5201E−04 −3.3516E−04 1.0012E−05  2.4078E−05 S₁₀ 01.9899E+00 −3.2868E−01   4.3924E−02 −7.4263E−03 1.4795E−03 −4.0483E−041.1174E−04 −7.5844E−06 S₁₁ 0 2.1098E+00 −2.9218E−01  −3.2879E−02−5.3227E−04 1.7710E−03 −3.4398E−05 −8.0419E−05  −3.8515E−05 S₁₂ 02.2540E+00 −4.5958E−01   7.9424E−03  1.0271E−04 1.1537E−03 −8.7776E−042.3072E−04 −1.4673E−04 S₁₃ 0 2.4095E+00 −8.7987E−02   5.8921E−02 1.5630E−03 −3.9633E−03  −7.9363E−04 7.9334E−04 −1.2551E−04 S₁₄ 02.4176E+00 1.1392E−01 −1.3685E−02  6.7038E−03 −7.3149E−04  −2.1211E−041.3974E−04  5.2531E−05 S₁₅ 0 2.3565E+00 1.2110E−01  7.3093E−03−2.0647E−03 1.3576E−03 −1.6472E−05 1.7699E−04 −2.7937E−05 S₁₆ 02.2654E+00 1.1979E−01  1.2232E−02 −1.4439E−03 1.0863E−03 −2.6553E−057.4177E−05 −3.6304E−05 S₁₇ 0 2.2802E+00 8.0600E−02 −1.7121E−02 3.0490E−03 −2.6796E−04  −3.5541E−05 −2.4619E−05  −2.5559E−06 S₁₈ 02.4245E+00 2.0883E−01 −3.8259E−02  5.3459E−03 −1.8825E−04  −1.6586E−04−5.2039E−06  −9.4617E−06 S₁₉ 0 3.0755E+00 5.5056E−01 −4.6892E−02 6.7617E−03 −7.8801E−05  −1.4180E−04 −6.3231E−05  −4.4062E−05 S₂₀ 03.0275E+00 3.6419E−01 −1.0546E−03  4.2089E−04 5.2717E−04 −8.8110E−06−1.4724E−05  −4.9271E−05

Furthermore, for the sake of clarity the term “substantially” is usedherein to imply the possibility of variations in values within anacceptable range. According to one example, the term “substantially”used herein should be interpreted to imply possible variation of up to10% over or under any specified value. According to another example, theterm “substantially” used herein should be interpreted to imply possiblevariation of up to 5% over or under any specified value. According to afurther example, the term “substantially” used herein should beinterpreted to imply possible variation of up to 2.5% over or under anyspecified value.

While this disclosure describes a limited number of embodiments, it willbe appreciated that many variations, modifications and otherapplications of such embodiments may be made. In general, the disclosureis to be understood as not limited by the specific embodiments describedherein, but only by the scope of the appended claims.

All references mentioned in this specification are herein incorporatedin their entirety by reference into the specification, to the sameextent as if each individual reference was specifically and individuallyindicated to be incorporated herein by reference. In addition, citationor identification of any reference in this application shall not beconstrued as an admission that such reference is available as prior artto the present application.

1. A camera, comprising: an optical path folding element (OPFE) for afolding a first optical path OP1 to second optical path OP2; a lensincluding N lens elements, the lens being divided into four lens groupsarranged along a lens optical axis and marked, in order from an objectside of the lens to an image side of the lens, G1, G2, G3 and G4; and animage sensor, wherein (Original) The camera is a folded Tele camera,wherein the lens elements of a lens group do not move with respect toeach other, wherein G1 and G3 do not move with respect to each other,wherein G2 and G4 do not move with respect to each other, wherein theTele camera is configured to change a zoom factor (ZF) continuouslybetween a minimum zoom factor marked ZF_(MIN) corresponding to a minimaleffective focal length marked EFL_(MIN) and a maximum zoom factor markedZF_(MAX) corresponding to a maximal effective focal length markedEFL_(MAX) by moving G1 and G3 together relative to the image sensor andby moving G2 and G4 together relative to the image sensor, whereinZF_(MAX)/ZF_(MIN)≥2, wherein switching from EFL_(MIN) to EFL_(MAX) orvice versa requires a lens stroke range S, and wherein a ratio R givenby R=(EFL_(MAX)−EFL_(MIN))/S fulfils R>2.
 2. The camera of claim 1,wherein R>3.
 3. The camera of claim 1, wherein R>5.
 4. The camera ofclaim 1, wherein the configuration to change the ZF continuouslyincludes a configuration to move G1 and G3 together relative to theimage sensor over a small range larger than 0.1 mm and smaller than 5mm, and to move G2 and G4 together relative to the image sensor over alarge range larger than 2 mm and smaller than 15 mm.
 5. The camera ofclaim 1, wherein the configuration to change the ZF continuouslyincludes a configuration to move G1 and G3 together relative to theimage sensor over a small range larger than 0.2 mm and smaller than 2.5mm, and to move G2 and G4 together relative to the image sensor over alarge range larger than 4 mm and smaller than 10 mm.
 6. The camera ofclaim 1, wherein the configuration to change the ZF continuouslyincludes a configuration to move G2 and G4 together relative to theimage sensor over a small range larger than 0.1 mm and smaller than 5mm, and to move G1 and G3 together relative to the image sensor over alarge range larger than 2 mm and smaller than 15 mm.
 7. The camera ofclaim 1, wherein the configuration to change the ZF continuouslyincludes a configuration to move G2 and G4 together relative to theimage sensor over a small range larger than 0.2 mm and smaller than 2.5mm, and to move the G1 and G3 together relative to the image sensor overa large range larger than 4 mm and smaller than 10 mm.
 8. The camera ofclaim 1, wherein G1 and G3 are included in a single G13 carrier and G2,and wherein G4 are included in a single G24 carrier.
 9. The camera ofclaim 8, wherein both the G24 carrier and the G13 carrier include railsfor defining a position of the G13 carrier relative to the G24 carrier.10. The camera of the claim 8, wherein a maximum stroke range of the G13carrier is S13, wherein a maximum stroke range of the G24 carrier isS24, and wherein a ratio S24/S13>7.5.
 11. The camera of the claim 8,wherein a maximum stroke range of the G13 carrier is S13, wherein amaximum stroke range of the G24 carrier is S24, and wherein a ratioS24/S13>12.5.
 12. The camera claim 8, wherein the G24 and G13 carriersare movable by, respectively, G24 and G13 actuators.
 13. The camera ofclaim 12, wherein one of the G24 actuator or the G13 actuator includesthree or more magnets.
 14. The camera of claim 1, wherein the lensincludes N=10 lens elements.
 15. The camera of claim 1, wherein a powersequence of lens groups G1-G4 is positive-negative-positive-positive.16. The camera of claim 4, wherein G1 includes two lens elements with apositive-negative power sequence, wherein G2 includes two lens elementswith a negative-negative power sequence, wherein G3 includes three lenselements with a positive-positive-positive power sequence, and whereinG4 includes three lens elements with a positive-negative-positive powersequence.
 17. The camera of claim 4, wherein G1 includes two lenselements with a positive-negative power sequence, wherein G2 includestwo lens elements with a negative-positive power sequence, wherein G3includes three lens elements with a positive-negative-positive powersequence, and wherein G4 includes three lens elements with apositive-negative-positive power sequence.
 18. The camera of claim 6,wherein G1 includes two lens elements with a negative-positive powersequence, wherein G2 includes three lens elements with apositive-negative-negative power sequence, wherein G3 includes threelens elements with a positive-negative-negative power sequence, andwherein G4 includes two lens elements with a negative-positive powersequence.
 19. The camera of claim 1, wherein (Original) The camera has aF number F/#, wherein the F/# at ZF_(MIN) is F/#_(MIN), wherein the F/#at ZF_(MAX) is F/#_(MAX), and whereinEFL_(MAX)/EFL_(MIN)>F/#_(MAX)/F/#_(MIN).
 20. The camera of claim 19,wherein EFL_(MAX)/EFL_(MIN)>F/#_(MAX)/F/#_(MIN)+0.5.
 21. The camera ofclaim 1, wherein a magnitude of an EFL of G2 |EFL_(G2)| varies less than10% from a magnitude of an EFL of G3 |EFL_(G3)|, and wherein |EFL_(G2)|,|EFL_(G3)|<EFL_(MIN).
 22. The camera of claim 4, wherein lens groups G1and G2 include 2 lens elements, and wherein lens group G3 and G4 include3 lens elements.
 23. The camera of claim 4, wherein the larger of athickness T_(G2) of G2 and of a thickness T_(G1) of G1 isT(G1,G2)_(MAX), wherein the smaller of T_(G2) and T_(G1) isT(G1,G2)_(MIN), and wherein T(G1,G2)_(MIN)/T(G1,G2)_(MAX)<0.8.
 24. Thecamera of claim 4, wherein a ratio of a thickness T_(G4) of G4 and athickness T_(G3) of G3 fulfils 0.9<T_(G4)/T_(G3)<1.1.
 25. The camera ofclaim 4, wherein the larger of a thickness T_(G2) of G2 and of athickness T_(G1) of G1 is T(G1,G2)_(MAX), wherein the smaller of T_(G2)and T_(G1) is T(G1,G2)_(MIN), wherein the larger of a thickness T_(G3)of G3 and a thickness T_(G4) of G4 is T(G3,G4)_(MAX), wherein thesmaller of T_(G3) and T_(G4) is T(G3,G4)_(MIN), and whereinT(G1,G2)_(MAX)/T(G3,G4)_(MIN)<0.5.
 26. The camera of claim 6, whereinlens groups G1 and G4 include 2 lens elements, and wherein lens groupsG2 and G3 include 3 lens elements.
 27. The camera of claim 6, whereinthe larger of a thickness T_(G2) of G2 and of a thickness T_(G1) of G1is T(G1,G2)_(MAX), wherein the smaller of T_(G2) and T_(G1) isT(G1,G2)_(MIN), and wherein 0.75<T(G1,G2)_(MIN)/T(G1,G2)_(MAX)<1.0. 28.The camera of claim 6, wherein the larger of a thickness T_(G3) of G3and a thickness T_(G4) of G4 is T(G3,G4)_(MAX), wherein the smaller ofT_(G3) and T_(G4) is T(G3,G4)_(MIN), and wherein0.5<T(G3,G4)Mm/T(G3,G4)_(MAX)<0.75.
 29. The camera of claim 6, whereinthe larger of a thickness T_(G2) of G2 and of a thickness T_(G1) of G1is T(G1,G2)_(MAX), wherein the smaller of T_(G2) and T_(G1) isT(G1,G2)_(MIN), and wherein 0.9<T(G1,G2)_(MAX)/T(G3,G4)_(MIN)<1.1. 30.The camera of claim 4, wherein (Original) The camera includes anaperture stop, and wherein the aperture stop is located at a frontsurface of a first lens element of G2.
 31. The camera of claim 30,wherein an EFL of G1 (EFL_(G1)) varies less than 50% from an EFL of G4(EFL_(G4)), and wherein both EFL_(G1) and EFL_(G4) vary by less than 20%from (EFL_(MAX)+EFL_(MIN))/2.
 32. The camera of claim 31, wherein G1 andG3 have each at least two lens elements, and wherein the first two lenselements in each of G1 and G3 are separated from each other on the lensoptical axis by <0.75 mm.
 33. The camera of claim 31, wherein G1 and G3have each at least two lens elements, and wherein the first two lenselements in each of G1 and G3 are separated from each other on the lensoptical axis by <0.1×EFL_(MIN).
 34. The camera of claim 33, whereinfirst two lens elements in G2 and in G4 are separated from each other atmargins of each lens element by <0.1 mm.
 35. The camera of claim 33,wherein first two lens elements in G2 and in G4 are separated from eachother at margins of each lens element by <0.01×EFL_(MIN).
 36. The cameraof claim 35, wherein the N lens elements include a first lens elementL1, a second lens element L2, an eighth lens element L8 and a ninth lenselement L9, and wherein L1 and L2 and L8 and L9 form respective doubletlenses.
 37. The camera of claim 4, wherein (Original) The cameraincludes an aperture stop, and wherein the aperture stop is located at arear surface of a second lens element of G2.
 38. The camera of claim 37,wherein an EFL of G1 (EFL_(G1)) varies less than 50% from an EFL of G4(EFL_(G4)) and wherein both EFL_(G1) and EFL_(G4) vary by less than 20%from (EFL_(MAX)+EFL_(MIN))/2.
 39. The camera of claim 38, wherein an EFLof G4 (EFL_(G4)) fulfils EFL_(G4)>10×EFL_(MAX).
 40. The camera of claim39, wherein G1 and G3 have each at least two lens elements and whereinthe first two lens elements in each of G1 and G3 are separated from eachother on the lens optical axis by <0.75 mm.
 41. The camera of claim 40,wherein G1 and G3 have each at least two lens elements and wherein thefirst two lens elements in each of G1 and G3 are separated from eachother on the lens optical axis by <0.1×EFL_(MIN).
 42. The camera ofclaim 41, wherein first two lens elements in G2 and in G4 are separatedfrom each other at margins of each lens element by <0.1 mm.
 43. Thecamera of claim 41, wherein first two lens elements in G2 and in G4 areseparated from each other at margins of each lens element by<0.01×EFL_(MIN).
 44. The camera of claim 43, wherein the N lens elementsinclude a first lens element L1, a second lens element L2, a third lenselement L3, a fourth lens element L4, a sixth lens element L6, a seventhlens element L7, an eight lens element L8 and a ninth lens element L9,wherein L1 and L2, L3 and L4, and L8 and L9 form respective doubletlenses, and wherein L6 and L7 form an inverted doublet lens.
 45. Thecamera of claim 6, wherein (Original) The camera includes an aperturestop, wherein the aperture stop is located at the front surface of thefirst lens element of G3.
 46. The camera of claim 45, wherein an EFL ofG1 (EFL_(G1)) and an EFL of G4 (EFL_(G4)) fulfillEFL_(G1)<0.15×EFL_(G4), and wherein both EFL_(G1) and EFL_(G4) vary byless than 20% from (EFL_(MAX)+EFL_(MIN))/2.
 47. The camera of claim 46,wherein an EFL of G1 (EFL_(G1)) and an EFL of G4 (EFL_(G4)) fulfillEFL_(G4)>10×EFL_(MIN).
 48. The camera of claim 47, wherein a maximumdistance between lens elements of the moving groups G1 and G3 is smallerthan 0.1×EFL_(MIN).
 49. The camera of claim 48, wherein the N lenselements include a first lens element L1, a second lens element L2, athird lens element L3, a fourth lens element L4, an seventh lens elementL7 and an eighth lens element L8, wherein L1 and L2, L3 and L4, formrespective inverted doublet lenses, and wherein L7 and L8 form a doubletlens.
 50. The camera of claim 4, wherein a difference between distancesof the OPFE from the front surface of the first lens element lensmeasured along an axis parallel to the lens optical axis for all ZFs ismarked Δd, and wherein a ratio of Δd and a lens thickness T_(Lens)fulfils Δd/T_(Lens)<0.25 when Δd<4 mm.
 51. The camera of claim 50,wherein Δd/T_(Lens)<0.05 for Δd<1 mm. 52-62. (canceled)
 63. The cameraof claim 1, wherein (Original) The camera is included in a camera modulehaving a module height H_(M), wherein the lens has a lens apertureheight H_(A), wherein both H_(M) and H_(A) are measured along an axisparallel to OPT, wherein H_(M)=5 mm−15 mm, wherein H_(A)=3 mm-10 mm, andwherein H_(M)<H_(A)+3 mm.
 64. The camera of claim 63, whereinH_(M)<H_(A)+2 mm. 65-73. (canceled)
 74. The camera of claim 1, whereinthe folded Tele camera is included in a dual-camera along with a Widecamera having a field-of-view larger than the folded Tele camera.
 75. Asmartphone comprising (Original) The camera of claim
 1. 76. A smartphonecomprising the dual-camera of claim 74.